TOWNSHIP 19, Maine — Six teenagers were involved in a rollover accident early Sunday that sent four of them to the hospital, one with serious injuries.

Those involved ranged from 13 to 17 years old. Police are not releasing their names because of their ages and because the accident remains under investigation.

The crash took place on the Montegail blueberry barrens just north of Columbia Falls.

Lt. Travis Willey of the Washington County Sheriff’s Department said the accident, which took place at 2:20 a.m., “absolutely involved alcohol and speed.’”

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The vehicle, which rolled over once, was owned by one of the victims, Willey said. It was a 2003 Mitsubishi sport utility vehicle.

All six teens were from Big Cove, New Brunswick, and were working on the blueberry barrens. Willey said he had difficulty finding their parents, some of whom were staying in campers and camp housing on blueberry land.

Willey said three of the teenagers were taken by ambulance to Down East Community Hospital in Machias, while the fourth was taken by LifeFlight Air Ambulance from the blueberry fields directly to Eastern Maine Medical Center in Bangor. None of the injuries appeared to be life-threatening.

Willey said it was still unclear whether any of the children were wearing seat belts or were ejected from the vehicle. He said he had not yet determined where they obtained the alcohol.

“There is still a lot we don’t know,” he said Sunday afternoon.

Willey was assisted at the scene by Deputy Sgt. Randy Perry, Columbia Falls Fire Department and three ambulances.